Controlled synthesis of single-crystalline α-Fe_2O _3 microanoparticles from the complex precursor of FeCl_3 and methyl orange

摘要

A facile method to prepare α-Fe_2O_3 microanoparticles by using the nanorod complex of FeCl_3 and methyl orange as precursors has been demonstrated. The single-crystalline α-Fe_2O_3 microanoparticles are successfully obtained by pyrolysis of the precursors at 800 °Cfor 4h. The growth process of the precursor is investigated. The products are characterized by x-ray powder diffraction (XRD), thermogravimetry analysis (TGA), magnetization measurement, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and high-resolution TEM. The potential applications in water treatment and gas-sensing properties are investigated.